Improvement in plows



J. L. GILL.

Plow. Y

Patented Aug. 28, 1855.

' sents a view from the landside.

UNITED STATES PATENT OFFICE.

JOHN L. GILL, OF COLUMBUS, OHIO.

IMPROVEMENT IN PLOWS.

Specification forming part of Letters Patent No. 13,493, dated August 28, 1855.

1'0 all whom it may concern:

Be it known that I, JOHN L. GILL, of Golumbus, in the county of Franklin and State of Ohio, have invented certain new and useful 1mprovementsin the Construction of Flows; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part thereof, in which-' Figure 1 represents a view of the plow from the furrow or mold-board side. Fig. 2 repre- Fig. 3 represents the plow dismembered, and Fig. 4 represents a view from the under side of the share.

Similar letters and figures where they occur denote like parts in the drawings.

The nature of my invention relates to the construction of a plow the mold-board of which is of steel and the share, sheth, and landside of cast-iron, and arranged and united in a manner that will be described.

Cast-iron and steel plows as heretofore constructed have been found objectionablein many points. In many soils a cast mold-board will not scour, and its resistance in the ground increases materially. A steel mold-board will, however, polish or scour and keep bright and smooth in any of the black or mucky soils. Cast iron shares and landsides have been found by experience to be equally as durable, if not more so, than steel, while they are much cheaper and can be more readily replaced when worn. To make that part of the plow which is most liable to be worn away of steel will 7 not answer, because every time it is sharpened or repaired the form of the part is changed,as metal must be drawn from some part of it to take the place of that worn away, and the consequence is that the plow is changed in form and will not run true. Steel and cast-iron properly disposed in a plow and suitably united, for strength and facility for repairs is found to be the best; and with these views and ends to be accomplished I have devised the within-described construction of plows, overcoming, as I believe, all the objections hitherto urged by farmers against the cast-iron plow and the steel plow,as they are termed, by placing the two metals in such position in the plow as will adapt the peculiar characteristics of each metal to the result to be attained.

To enable others skilled in the art to make and use my invention, I will describe the same with reference to the drawings.

The sheth is made of cast-iron, and has a broad flange, a, in front, extending furroward, and flared at its lower portion to fit and form a support and attachment for the mold-board b of steel and the share a of castiron. The holes 1 2 3 in the flange or wing at are for the bolts which secure the mold-board to the face or front side of the sheth. That part of the winged surface of the shethto which the share is applied is depressed,as seen at d, Fig. 3,below the general surface to a depth equal to about one-third of the thickness of the share, so as to bring the upper surface of the share even or flush with the mold-board at their place of juncture. This depression at is made in order to add strength and thickness to the share, and to render it immovable when bolted to its place. For this purpose, also, the joint-edge 4 of the share is undercut and provided with a lip, 5, so that the two parts-vim, the moldboard and share-when bolted to their places on the face of the sheth, are held securely together and prevent a continuous turning-surface. The lip 5 prevents the share from breaking by an upward pressure or strain by the position which it occupies on the under surface of the mold-board. The firm attachment, also, of the landside e, of cast-iron,is secured by the flanges 6 7 at the sides, and those 1314. around the holes 13 14, which hold the piece absolutely immovable when drawn to its place by the bolts.

8 9 10 11 12 13 14, 850., represent the several bolt-holes.

The flange which surrounds the bolt-hole 14 is embedded in the handle of the plow, thereby relieving the bolt of a great part of its strain, adding strength to the landside, and making abroad and substantial bearing for the handle of the plow.

The colterf has a lug, 15, on its lower end, which fits into a socket or recess, 16, in the share, and is held firmly to its place at its upper end by a key or wedge driven between the upper edge of the colter and the under edge of the upper dovetail lug, 17, which is made to project forward of the lower dovetailed lug, 18, in order that the colter may be pressed firmly on the share as the key is driven in, the dovetailed lugs preventing the eolter from getting out of place by a twisting side strain or pressure or j arrin g action, because the key or wedge, acting against the projecting log 17; springs the eolter-shank slightlydownward and makes it rigid and immovable.

Having thus fully described the nature of my invention, I would state that I am aware a combined steel and cast-iron mold-board has been used, and also that a cast standard has been used. These I do not claim. Neither do 

